塑殼斷路器型號規格

塑殼斷路器（英文簡稱為MCCB）主要作(zuo)用是為低壓(ya)配(pei)電系統和電動機保護(hu)回路中的(de)過載、短(duan)路提供特殊的(de)保護(hu)功(gong)能(neng)。由于其可靠性(xing)和穩定性(xing)，因此，成為工業上應用十分廣(guang)泛的(de)產品。

塑殼(ke)斷路器不同的型(xing)號(hao)有不同的尺寸。斷路器一(yi)般由(you)觸(chu)頭系統(tong)、滅弧系統(tong)、操作機構、脫扣器、外殼(ke)等構成。

塑(su)殼(ke)斷(duan)路器的型號(hao)開(kai)(kai)頭3個字母為系列(lie)代號(hao)有NS,NSX,NSE,CVS,EZD。代號(hao)之后是(shi)開(kai)(kai)關(guan)殼(ke)架電(dian)流(liu)+開(kai)(kai)關(guan)分斷(duan)能力代號(hao)，如(ru)NSX100N殼(ke)架電(dian)流(liu)100A。分斷(duan)能力N為50KA。

開(kai)關極數(shu)和脫(tuo)扣(kou)(kou)器類(lei)型(xing)和開(kai)關額(e)(e)定電(dian)流(liu)如:NSX100N3P3DTM25D NSX系列，殼架電(dian)流(liu)100A,3P3D為3極,TMD為熱磁脫(tuo)扣(kou)(kou)25為額(e)(e)定電(dian)流(liu)25A。

塑殼(ke)式斷路器一般(ban)用(yong)于(yu)配電(dian)饋線(xian)控制和保護，小型配電(dian)變壓器的(de)低壓側出線(xian)總開關，動力配電(dian)終端控制，也可用(yong)于(yu)各種生產機械的(de)電(dian)源開關。

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斷路器殼架等級

斷路器殼(ke)架等級(ji)額(e)定電流是指基本尺寸(cun)相同的(de)(de)框(kuang)架和塑料外殼(ke)中能裝的(de)(de)最大脫(tuo)扣器的(de)(de)額(e)定電流。

斷(duan)(duan)路(lu)器額定電(dian)流(liu)(liu)(liu)是指斷(duan)(duan)路(lu)器中的脫扣(kou)器能長期通過的電(dian)流(liu)(liu)(liu)，又稱斷(duan)(duan)路(lu)器脫扣(kou)器額定電(dian)流(liu)(liu)(liu)。

同(tong)一(yi)系(xi)列中(zhong)(zhong)(zhong)有多種(zhong)殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，同(tong)一(yi)殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)(zhong)又(you)有多種(zhong)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。例(li)如DZ20系(xi)列中(zhong)(zhong)(zhong)有100、225、400、630、800、1250等(deng)殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，而100殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)(zhong)有16A、20A、25A、32A、40A、50A、63A、80A、100A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu);225A殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)(zhong)有100A，125A、160A、180A、200A、225A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。DZ20—100和(he)DZ20—225兩種(zhong)殼架(jia)等(deng)級中(zhong)(zhong)(zhong)都有100A額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，但斷路器(qi)(qi)體積外形和(he)分斷能力(li)不相同(tong)，因(yin)此在選用時要(yao)把型號填寫完(wan)整即(ji)具(ju)體的(de)殼架(jia)等(deng)級額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)內的(de)斷路器(qi)(qi)額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)分級是按 (1.25)優先系(xi)數來選擇的(de)：一(yi)方面是符合和(he)滿足最大線(xian)路和(he)電(dian)(dian)(dian)(dian)器(qi)(qi)元件額(e)(e)(e)(e)定(ding)(ding)(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)需要(yao);另一(yi)方面是為(wei)了標(biao)準化(hua)，以取(qu)得最佳的(de)使用導(dao)線(xian)及加(jia)工的(de)效(xiao)益。因(yin)此它(ta)(ta)所規(gui)定(ding)(ding)(ding)(ding)(ding)的(de)級別是：3(6)、8、10、12.5、16，20、25、32、40、50、63、80，100、125、160、200、250、315、400A等(deng)。由于此規(gui)定(ding)(ding)(ding)(ding)(ding)，當線(xian)路計算負載為(wei)90A時，則只能選100A規(gui)格，因(yin)此在一(yi)定(ding)(ding)(ding)(ding)(ding)程(cheng)度上影響它(ta)(ta)的(de)保護(hu)性(xing)能。

脫(tuo)扣器(qi)(qi)電(dian)流(liu)(liu)(liu)整定(ding)值(zhi)是(shi)指(zhi)脫(tuo)扣器(qi)(qi)調(diao)(diao)整到動作電(dian)流(liu)(liu)(liu)值(zhi)。它是(shi)指(zhi)額(e)定(ding)電(dian)流(liu)(liu)(liu)In的倍數，是(shi)動作電(dian)流(liu)(liu)(liu)值(zhi)，例如(ru)：過電(dian)流(liu)(liu)(liu)整定(ding)到電(dian)流(liu)(liu)(liu)的1.2、1.3、5、10倍，就寫(xie)成(cheng)Ir=1.2In，1.3In、5In、10In等。現(xian)在(zai)一些電(dian)子(zi)脫(tuo)扣器(qi)(qi)，它的過載長延(yan)時額(e)定(ding)電(dian)流(liu)(liu)(liu)是(shi)可(ke)調(diao)(diao)的，所調(diao)(diao)整的電(dian)流(liu)(liu)(liu)，其實仍是(shi)額(e)定(ding)電(dian)流(liu)(liu)(liu)，是(shi)可(ke)長期通過的最大電(dian)流(liu)(liu)(liu)。

額定工(gong)(gong)作(zuo)電(dian)流(liu)是斷路器在(zai)裝輔助觸頭(附件)時觸點在(zai)一定工(gong)(gong)作(zuo)電(dian)壓下的實際工(gong)(gong)作(zuo)電(dian)流(liu)，電(dian)流(liu)為3A或6A，用于控制和保護(hu)回路。

塑殼斷路器選型

1、阻抗百分比-與變壓器短路電壓百分比相等

阻抗電壓百分比又稱短路電壓百分比，表明變壓器內阻抗的大小。變(bian)壓(ya)(ya)器(qi)(qi)的(de)短(duan)路阻抗百(bai)(bai)分比,在數值(zhi)上(shang)與變(bian)壓(ya)(ya)器(qi)(qi)短(duan)路電(dian)壓(ya)(ya)百(bai)(bai)分比相等。它(ta)是指將變(bian)壓(ya)(ya)器(qi)(qi)二次繞(rao)阻短(duan)路，在一次繞(rao)阻施(shi)加電(dian)壓(ya)(ya)，當二次繞(rao)阻通過額定電(dian)流時(shi)，一次繞(rao)阻施(shi)加的(de)電(dian)壓(ya)(ya)與額定電(dian)壓(ya)(ya)之比的(de)百(bai)(bai)分數。

變(bian)(bian)壓(ya)(ya)(ya)器(qi)的短路(lu)阻(zu)抗(kang)值百分比是變(bian)(bian)壓(ya)(ya)(ya)器(qi)的一個重(zhong)要(yao)參數,它表(biao)明變(bian)(bian)壓(ya)(ya)(ya)器(qi)內阻(zu)抗(kang)的大(da)小(xiao)，即變(bian)(bian)壓(ya)(ya)(ya)器(qi)在額定負荷運行(xing)(xing)時(shi)變(bian)(bian)壓(ya)(ya)(ya)器(qi)本身(shen)的阻(zu)抗(kang)壓(ya)(ya)(ya)降(jiang)大(da)小(xiao)。它對(dui)于(yu)變(bian)(bian)壓(ya)(ya)(ya)器(qi)在二次(ci)側發生突然短路(lu)時(shi)，會產生多(duo)大(da)的短路(lu)電流有(you)決(jue)定性的意義，對(dui)變(bian)(bian)壓(ya)(ya)(ya)器(qi)制造價(jia)格(ge)大(da)小(xiao)和變(bian)(bian)壓(ya)(ya)(ya)器(qi)并列運行(xing)(xing)也(ye)有(you)重(zhong)要(yao)意義。

由于(yu)這些(xie)特點，于(yu)是短(duan)路(lu)阻(zu)抗值(zhi)習慣使用百(bai)分比數值(zhi)。如果在某些(xie)場合需要(yao)使用實(shi)際(ji)數值(zhi)計算(suan)，當然(ran)要(yao)換(huan)算(suan)。

2、額定電壓選擇

即塑料(liao)外殼式斷路器的電(dian)(dian)壓(ya)等級是多少，常見的抵押配電(dian)(dian)系統(tong)為400v，如(ru)小區住宅區，配電(dian)(dian)房的配電(dian)(dian)電(dian)(dian)壓(ya)配比為10/0.4，一般采用TN-C-S或TN-S系統(tong)，變壓(ya)器的中(zhong)性點直接(jie)接(jie)地，當然(ran)也不排除(chu)690v，如(ru)風電(dian)(dian)場新(xin)能(neng)源發(fa)電(dian)(dian)，所以選擇斷(duan)路器額(e)定電(dian)(dian)壓(ya)與系統(tong)電(dian)(dian)壓(ya)相適應(ying)，塑殼斷(duan)路器的極限分段能(neng)力與額(e)定電(dian)(dian)壓(ya)息息相關。

3、額定極限分斷電流ICU

根據GB14048.2低壓斷(duan)路器標(biao)準，是指斷(duan)路器一次短路后不(bu)要(yao)求再承受起(qi)額定電流(liu)的分斷(duan)能力(li)，后者一般為前(qian)者的百分之25，50，75，100。

塑殼(ke)斷(duan)(duan)路器的額定極限分(fen)斷(duan)(duan)電(dian)(dian)流(liu)ICU和額定運(yun)行短(duan)路電(dian)(dian)流(liu)ics與額定電(dian)(dian)壓有(you)關系，同一型號的塑殼(ke)斷(duan)(duan)路器在不同額定電(dian)(dian)壓下，其分(fen)斷(duan)(duan)能(neng)力不一樣，電(dian)(dian)壓能(neng)級越(yue)高滅(mie)弧越(yue)困難，斷(duan)(duan)路器能(neng)分(fen)斷(duan)(duan)的短(duan)路電(dian)(dian)流(liu)越(yue)低(di)。如下圖塑殼(ke)斷(duan)(duan)路器NSX100F，在85/415v電(dian)(dian)壓下，分(fen)斷(duan)(duan)能(neng)力為(wei)36kA,660/690v額定電(dian)(dian)壓下為(wei)8KA。

4、短路器的額定電流

斷路器的額定電流等于額定不間斷電流Iu且(qie)等于約定(ding)自由空氣發(fa)熱(re)電流Ith，也(ye)就是斷(duan)路(lu)(lu)器(qi)(qi)能連續承載且(qie)不(bu)超高(gao)溫升的(de)(de)電(dian)(dian)流(liu)(liu)(liu)(liu)，斷(duan)路(lu)(lu)器(qi)(qi)的(de)(de)殼(ke)架電(dian)(dian)流(liu)(liu)(liu)(liu)指(zhi)斷(duan)路(lu)(lu)器(qi)(qi)能裝的(de)(de)最大的(de)(de)過(guo)電(dian)(dian)流(liu)(liu)(liu)(liu)脫(tuo)扣(kou)器(qi)(qi)的(de)(de)額(e)定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)，如NSX100斷(duan)路(lu)(lu)器(qi)(qi)有兩種反時限(xian)過(guo)電(dian)(dian)脫(tuo)扣(kou)器(qi)(qi)的(de)(de)額(e)定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)等級(ji)40A和100A，100A是NSX100F的(de)(de)殼(ke)架電(dian)(dian)流(liu)(liu)(liu)(liu)，反時限(xian)過(guo)電(dian)(dian)流(liu)(liu)(liu)(liu)脫(tuo)扣(kou)器(qi)(qi)整定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)是根據線路(lu)(lu)計算電(dian)(dian)流(liu)(liu)(liu)(liu)和導體長期運行電(dian)(dian)流(liu)(liu)(liu)(liu)在脫(tuo)扣(kou)器(qi)(qi)上(shang)整定(ding)的(de)(de)電(dian)(dian)流(liu)(liu)(liu)(liu)值。